Valve housing



F eb. 9, 1932.

G. C. DAVISl VALVE HOUSING Filyed Jan. 7, 1929 Cil Patented Feb. 9, 'i932 UNITED STATES PATENT OFFICE GEORGE C. DAVIS, OF CHICAGO, ILLINOIS, ASSIGNOR TO Gr. M. DAVIS REGULATOR COM- PANY, F CHICAGO, ILLINOIS, .A CORPORATION OF ILLINOIS VALVE HOUSING Original application filed March 256, 1926, Serial No. 97,510. Divided and this application filed January 7, 1929. Serial No. 330,806. Y

My invention relates to improvements in valve control means and is particularly adapted for use in connection with the type of valve wherein a flexible diaphragm is used associated with a pressure chamber which responds to variations in pressurein some part of the line to control or operate the valve. The present application is a division of co-pending application Ser. No. 97,- 510, filed on March 26, 1926.

One object of my invention is to provide means for limiting or controlling or suppleinenting the regulatory action of the pressure diaphragm herein described. Another object is to provide a limiting or damping means for controlling the movement of a lever associated with a pressure or expansion diaphragm. @ther objects will appear from time to time in the course of the specification and claims.

My invention is illustrated more or less diagrammatically in the accompanying drawing which is a section through the valve and 4 housing illustrating a dash pot partially in vertical axial section.

Like parts are indicated by like characters throughout.

A is a valve housing communicating` at one end with an intake pine A1 at the other end with an exhaust pipe 2. A3 is a globe contained within the housing and having valve seats A4 A5 through which gas or air or liquid may pass from the intake to the outlet side of the valve housing. A6 is the valve barrel adapted to extend through the valve seats A5 A4E and carry valve discs A7 A8 with guiding lingers A9 adapted to guide the valve disc members toward and from the seats. A is a yoke on the valve in loose engagement with a valve stem A11 provided with a head A12 to engage the yoke.

The valve stem A11 extends up through an aperture B at the' top of the valve housing into the pneumatic control chamber B1 which is located in a housing B2 having a cover B3 and bolted onto the valve housing A so that an opening in the wall of the housing B2 is in register with the opening B. B4 is a diaj phragm held at its edges between flanges B5 B6 on the cover and housing. This diaphragm is reinforced by plates B7 B8 slidable on a stud B9 and clamped against the' shoulder B10 to compress the diaphragm by means of the threaded connecting rod B11. The valve stem A11 is pinned between the ears B12 on the stud B9.

The cover B5 is open to permit the member B11 to project outwardly above the diaphragm. A flange C surrounds this open ing and projects upwardly from the cover. Associated with the member B11 is a bell@l which extends downwardly outside theI flange C and in all positions extends down below the top ofthe flange. This bell carries the member B51 and terminates in a yoke C2 pivoted on the lever arm C5 which arm in turn is pivoted on a fulcrum arm C4 on the cover B3 and carries at its other end a yoke C5 having a bell()G extending down and enclosing the' upper end of a dash pot C7, C2 being a dash pot piston rod extending down from the yoke C5 within the bell C5 and carrying the piston C9 slidable in the dash pot C7.

The dash pot C7 is longitudinally adjustable in a split ring D, which ring may be clamped on the dash pot by means of a clamp screw D1. This ring is pivoted at D2 on an arm D3 carried by the cover B2 so that the dash pot is given the necessary reciprocating movement to compensate for the movement of the lever C2. An adjustable weight D4 is carried by the lever C3.

Experience shows that when gas is drawn through the valve at a rapid rate of speed, if the opening between the valve housing and the diaphragm housing is unobstructed, there is a tendency of the pressure in the diaphragm housing to be reduced below the pressure in the valve housing as a result of the ejector ell'ect of the rapidly moving gas and thus the adjustment for the diaphragm movement will vary as the gas velocities vary even though the actual gas pressure may not vary. In order to prevent this, a fixed diaphragm E is inserted in the throat between the valve housing and the diaphragm housing. This iiXed diaphragm comprises a cup-like member iianged at E1 and held in place' by clips E2 associated with the cap screws E3 which hold the two diaphragme together. This cap is perforated to permit passage of the valve stem i 11. rIhis sleeve is in working Contact with the valve stem, the Contact being sufficiently light so that no appreciable friction is set up but such that air or gas circulation between the two chambers is minimized and the ejector etiect completely dissipated. E5 is a pipe leading from the interior of the diaphragm housing B to the pipe A1 so that the pressure in the diaphragm housing is the same as the pressure in the intakeV pipe.

' This arrangement oi diaphragm in the throat between the diaphragm housing and the valve housing and the protecting mantle or bell protecting the open mouth or surface of the diaphragm and the dash pot though illustrated here as applied to a casing head regulator may berused either separately or in conjunction with many different valve arrangements and particularly the bell and housing for the diaphragm may be used in connection with any valve arrangement Lor mechanism where the valve is exposed to the elements or dust, dirt and the like.

I claim:

l. In combination with a valve controlling diaphragm and housing thereabout, a lever P pivoted adjacent said diaphragm, a connection between said diaphragm and said lever including a stem outwardly projecting from said diaphragm, an extension of said housing about said stem, a dash pot cylinder, a plunger penetrating said dash pot, secured to said lever, and bells, associated with said lever about said dash pot cylinder and about said extension of said housing.

2. In a device for controlling the flow of a iiuid, a valve, and a valve controlling diaphragm, a stem projecting outwardly from said diaphragm, a lever to; which said stem is pivoted, a dashpot having an open top, a dashpot piston rod projecting outwardly therefrom, and operatively secured to said lever at a point spaced along said lever from its engagement with said stem, and a bell carried by the lever and enclosing but out of contact with the open end of the dashpot.

3. The structure of claim 2 characterized b v the employment of a housing about said diaphragm, the lever and dashpot being eX terior to said housing.

Il. The structure of claim 2 characterized by the employment of a housing about said diaphragm, a lever abutment positioned upon said housing, the lever being pivoted to said abutment intermediate the connections between the lever and the diaphragm stem and the dashpot piston.

5. The structure of claim 2 characterized by the employment of a housing about said diaphragm, and an extension from said housing about the Vdiaphragm stem, and a bell carried by the lever and enclosing but out of contact with said extension.

6. In a device for controlling the flow of a fluid, a valve and a valve controlling diaphragm, a lever pivoted adjacent said diaphragm, a connection between said diaphragm and said lever, a dashpot and a connection between said dashpot and said lever, and a fixed pivot abutment to which said lever is pivoted intermediate its connection with the diaphragm and dashpot.

7. rllhe structure of claim 6 characterized by the employment of a housing about said diaphragm, the dashpot being mountedl on said housing.

8. The structure of claim 6 characterized by the employment of a housing about said diaphragm, the dashpot being adjustably mounted upon said housing.

Signed at Chicago, county of Cook and State of Illinois, this 2nd 'day of January, 1929.

GEORGE C. DAVIS.

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